600MW机组高温再热蒸汽管道放气管裂纹原因分析与处理
Cause Analysis and Settlement of Exhaust Pipes Crack in High Temperature Reheated Steam Pipe of 600MW Unit
李中伟, 张东文, 赵纪峰, 张广兴
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作者单位:河北省电力研究院,河北 石家庄 050021
中文关键字:高温再热蒸汽管道;放气管;裂纹;应力集中;热疲劳
英文关键字:high temperature reheated steam pipe; exhaust pipes; crack; stress concentration; thermal fatigue
中文摘要:对某发电公司600MW机组高温再热蒸汽管道放气管裂纹原因进行了分析,认为冷凝水倒流使温度较高的管座内壁形成热交替循环;支吊架安装不合理造成管系振动;管接头变径坡度过大而在管座变径处产生应力集中,这些最终导致该裂纹的产生。对此提出了相应的处理意见,并取得了良好效果。
英文摘要: The causes and settlements of exhaust pipes crack were analyzed. The reasons are that condensed water flow backwards to make heat circulating of high temperature tube, improper bracket installation leads to tube vibration. Variable diameter grade of large tube tiein produces stress concentration on tube variable diameter part.